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A thin section of a maize leaf would show

  • (a) vascular bundles without any sheath, scattered in spongy tissue Your answer
  • (b) bundle sheath cells without any chloroplasts around each bundle Your answer
  • (c) palisade mesophyll only, below the upper epidermis, and no sheath Your answer
  • (d) a ring of large, chloroplast-rich bundle sheath cells around each bundle Correct
Your answer: Correct answer: (d)
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Explanation

Why (d) is correct

Maize is a C4 plant, so its leaf section shows Kranz anatomy: a ring of large, chloroplast-rich bundle sheath cells around each vascular bundle.

Why the other options are wrong

  • (a) · your answer Maize bundles have a distinct bundle sheath.
  • (b) · your answer The bundle sheath cells of maize are rich in chloroplasts.
  • (c) · your answer Maize leaves (isobilateral monocot leaves) do not have this arrangement, and they have a sheath.
NCERT point: This anatomy is how C4 plants are identified in leaf sections.
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